From Texas Standard:
On April 17, around 7:50 in the early evening, an explosion at the Adair Grain and West Fertilizer Company rocked the small town of West, Texas. That was three years ago.
Fifteen people died, including 12 volunteers fighting the fire at the plant. More than 160 people were injured. The blast was so severe it caused a small earthquake – the concussion waves were visible to the naked eye. A nearby middle school, nursing home and apartment complex were demolished. Neighborhood homes were destroyed.
It seemed possible that the fires could have been started by a short circuit somewhere – the facility was old – or that a golf cart with dodgy electrics might have been the spark that set off the blaze. But state and federal officials say the explosion at West was the outcome of a criminal act.